In one of the weirdest spin off from Happy Days, Mork (Robin Williams) is from the planet Ork. He is sent to Earth by Orson who is frustrated with his irreverent humor. At the end of each episode, Mork reports to Orson about the lesson he learned. Orkans drink with their fingers, sit on their heads, and age backwards. Mork lands outside of Boulder, Colorado and finds Mindy McConnell (Pam Dawber) abandoned by her date. He tells her about his extraterrestrial origins and becomes her flatmate. Her father Fred owns a music store in the first season which he ran with his sharp-tongued mother-in-law. Mr. Bickley (Tom Poston) is Mindy's grumpy downstairs neighbor. The second season has New York siblings Remo (Jay Thomas) and Jean DaVinci (Gina Hecht) as their restaurateur friends. Nelson Flavor (Jim Staahl) is Mindy's pompous cousin. Exidor is Mork's crazy friend with imaginary followers. The most insane and inspired choice is Mearth (Jonathan Winters), Mork's newborn in season 4, after his wacky performance in season 3 as uncle Dave.
This is simply a Robin Williams original. He makes this show. The show really only works with him on the screen. Pam Dawber is cute but she is overmatched. Of course, almost anybody would be overmatched. She has a tendency to laugh at Robin's jokes and do a lot of aww-schucks. The constant changes to the cast are not helpful. The DaVinci siblings didn't do the work that the show had hoped. Nelson Flavor and Exidor are my favorite characters. There is nobody like Jonathan Winters but by the fourth season, the show had no viewers and Robin Williams had better opportunities on the big screen.